Chicago's largest integrated marketers

Crain's has just published its list of Chicago's largest integrated marketing and public relations firms, ranked by local professional staff as of Dec. 31, 2010. This is the first time Crain's has issued a combined list.

The 25 firms are ranked by the number of local "professionals," meaning employees who work directly on client services, excluding support and administrative staff. The list also highlights local and worldwide revenue, agency specialties and top accounts.